- scratch hardness
-
resistance of a material, as a stone or metal, to scratching by one of several other materials, the known hardnesses of which are assembled into a standard scale, as the Mohs' scale of minerals.[1925-30]
* * *
Universalium. 2010.
scratch hardness
Look at other dictionaries:
Scratch hardness — Scratch hardness. См. Склерометрическая твердость. (Источник: «Металлы и сплавы. Справочник.» Под редакцией Ю.П. Солнцева; НПО Профессионал , НПО Мир и семья ; Санкт Петербург, 2003 г.) … Словарь металлургических терминов
scratch hardness — resistance of a material, as a stone or metal, to scratching by one of several other materials, the known hardnesses of which are assembled into a standard scale, as the Mohs scale of minerals. [1925 30] … Useful english dictionary
Hardness — This article is about mechanical properties of materials. For other uses, see Hard. Hardness is the measure of how resistant solid matter is to various kinds of permanent shape change when a force is applied. Macroscopic hardness is generally… … Wikipedia
Hardness — Hard ness, n. [AS. heardness.] 1. The quality or state of being hard, literally or figuratively. [1913 Webster] The habit of authority also had given his manners some peremptory hardness. Sir W. Scott. [1913 Webster] 2. (Min.) The cohesion of the … The Collaborative International Dictionary of English
hardness — /hahrd nis/, n. 1. the state or quality of being hard: the hardness of ice. 2. a relative degree or extent of this quality: wood of a desirable hardness. 3. that quality in water that is imparted by the presence of dissolved salts, esp. calcium… … Universalium
hardness — a measure of the hardness of a metal or mineral. Hardness is a property easy to appreciate but difficult to quantify and measure. The Mohs hardness scale is used in geology to give a rough estimate of hardness by testing which minerals are… … Dictionary of units of measurement
hardness — noun Date: before 12th century 1. the quality or state of being hard 2. a. the cohesion of the particles on the surface of a mineral as determined by its capacity to scratch another or be itself scratched compare Mohs scale b. resistance of metal … New Collegiate Dictionary
hardness — hard•ness [[t]ˈhɑrd nɪs[/t]] n. 1) the state or quality of being hard 2) chem. that quality in water that is imparted by the presence of dissolved salts, esp. calcium sulfate or bicarbonate 3) mir the comparative ability of a substance to scratch … From formal English to slang
hardness — /ˈhadnəs/ (say hahdnuhs) noun 1. the state or quality of being hard. 2. an instance of this quality. 3. that quality in impure water which is imparted by the presence of dissolved salts, especially calcium sulphate. 4. Mineralogy the comparative… …
pencil hardness — a traditional measure of the hardness of the leads (actually made of graphite) in pencils. The hardness scale, from softer to harder, takes the form ..., 3B, 2B, B, HB, F, H, 2H, 3H, 4H, .... The letters stand for Black, Hard, and Firm. (There … Dictionary of units of measurement
